From Lexicanum

The Earthshaker Cannon is the greatest piece of Imperial Guard artillery commonly deployed to battlefields. It is best known for it's range, so great that it can bombard enemy positions from well beyond the range of other conventional weapons. It is also exceptionally powerful due to the large calibre shells it fires, often devastating a small area rather than a single point.¹

The Earthshaker is often mounted on a vehicle known as the Basilisk ¹ but also appears in static artillery positions as well as built into to fortifications and defences.²

Images

Earthshaker Platform

Basilisk armed with Earthshaker Cannon

Sources

• ¹:Codex: Imperial Guard (3rd Edition, 2nd Codex)
• ²:Imperial Armour Volume One - Imperial Guard and Imperial Navy

See also

• Ordnance Weapons